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Notes Payable and Advances-Related Parties - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Debt Instrument [Line Items]
Advance from related party			$ 524	$ 555
Non-cash interest expense	$ 59	$ 45	$ 170	$ 124
Related Party [Member]
Debt Instrument [Line Items]
Annual interest rate			8.00%

The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates.

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